When planning a journey to Piedras Negras, it is important to consider the local climate features, which are distinguished by pronounced seasonality. The weather here is predominantly hot and dry, which is typical for this region of Mexico.
Summer months, from June to August, bring intense heat. The average temperature during this time holds at around 31–32°C, and during the day, the air often heats up to 37°C and above. July is considered the hottest month of the year. Rainfall is extremely scarce in summer, so the heat is easier to bear thanks to the dry air, but sun protection products are mandatory.
Winter in the city is mild and quite cool by local standards. In January, the coldest month, the average temperature is about 13–14°C, and at night the thermometer can drop to 7–8°C. This time of year is suitable for travellers who wish to avoid the scorching sun.
Spring and autumn are considered the most comfortable periods for walking and sightseeing. In March, April, and October, daytime temperatures range from 21°C to 25°C, creating ideal conditions for tourism. Rains in the region are a rare phenomenon, although the number of cloudy days increases slightly in May compared to the rest of the year.